Starting College Calculus

Hey everyone, i'm a 2nd year econ student at UM, Ann Arbor. Never thought i'd end up in another pure math course, but calc is recommended for bunch of upper level econ classes so I decided to take it over the summer. Usually i'm pretty decent at getting stuff down during class but from time to time I do run into problems that I have no idea how i'm messing up . Anyways, i'm glad I found this site, it seems like people here are pretty helpful, and hey, maybe I could end up being of help to a couple of people during my time here.